Engraver&#39;s block.



J. & G. F. SCHEER.

ENGR/wams LocK.

APPLICATION FILED MAR. 29, 1916.

1,204,696. Patented Nov. 14, 1916.

Ffm ,2.

' awww UNITED STATES A*PATENT ornicn.

JOHN sonnen, or ATLANTA, GEORGIA, AND GEORGE r. sonnen, or RICHMOND,VIpBGINlA- ENGRAVERS nLocK.

Specification of ietters Patent.

.Application mea Maren 29, 1916. serial No. 87,560;

of Virginia, respectively, have invented cer- Y illustrated in theaccompanying drawing,

tain new and useful Improvements in Engravers Blocks, ofrwhich thefollowing is a specification. v

The invention relates to an engravers block, and more particularly tothe class of jaw attachments for'engravers blocks.

The primary object of the invention is the provision of an attachment ofthis character, wherein` the separable pins for insertion in the jaws ofthe engravers block, are entirely dispensed with, thereby eliminatingthe possibility of the loss of said pins, and also the labor and timerequired in inserting and interchanging the same in the jaws of theblock, for the clamping of the work to be engraved. -4

Another ob.' ect of the invention is the pro.- vision of an attachmentof this character, wherein the series ofclamping pins are resilientlymounted therein, andare supported upon a movable plate or follower, sothat one or more of said pins can be displaced while other pins areengaged with the work, thereby enabling the execution of the engravingwith perfect freedom and successfully, as well as the use of the jawswithout interference by the pins.

A further object of the' invention is the provision of an attachment ofthis character, wherein the construction thereof is novel in form, andthe'pins readily andV easily adjusted with despatch, for the successfulclamping of the work to be'engraved.

A still further object of the invention is the provision of anattachment of this character, which is extremely simple in construction,thoroughly reliable and efficient in operation, strong, durable, andinexpensive in manufacture. v

Vith these and other objects in view the invention consists in thefeatures of construction, combination and arrangement of parts as willbehereinafter fully described,

and pointed out in the claims hereunto appended.

In the accompanying drawing, Figure 1, is a side elevation of anengraving block showing the attachment constructed in accordanc-e withtheinvention applied.; Fig. Q, is a topplan view. Fig. 3, is a verticalsectional elevation. Fig. 1, is a sectional view onthe line Jr-et ofFig. 1. Fig. 5 is a 'fragmentary .view showing in detail a piece of workclamped by the device.` Similar reference characters indicate cor-Patented Nov. 14;,

responding parts throughout Vthe several views inthe drawing.

Referring to theu drawing in detail, A,

designates the ball base, B, the pedestal,

which is detachable therefrom, C, the head upon the pedestal, and D, theadjustable jaws supported in the head, which constitute the engraversblock, of the ordinary well known construction, rand having appliedthereto the attachment hereinafter fully described. p

The attachment comprises complementary shells 5, each being made in twoor Vmore parts, suitably fastened together, to permit separation thereofinl event access is to be had to the interior of the shell, and isof a:shapecorresponding to the j aw on the block, the vupper endof the.shell being formed with acllosed top 6, while the opposite end isY open'for the' telescoping of said shell vupon its respective jaw D, of theblock. The

shell 5, is fastenedpto the jaw l), in anyV suitable manner.

v'Interiorly of the shell 5, is movable fol'- lower comprising spacedupper and lower plates 7 and 8, respectively, which are united toeachother through the medium of rivets'9, the plate '7, being formedwith a plurality of holes 10, arranged in rows spaced apart, throughwhich work clamping pins 11, having lower terminal heads 12, which formstops for the same to limit the sliding movements of the pins 11, in onedirection in said plate 7, while formed on said pins are annularshoulders 13, against which bear coiled springs 14, surrounding saidpins 11, and also bear Vagainst the plate 7, for resiliently supportingthe pins, which V are adapted to slide through holes 15, formed in thetop 6, of the shell, for clamping engagement with a piece o-f work to beengraved.

Journaled in opposed walls of the shell 5, below the follower therein isa horizontal shaft 16, which carries a cam 17, adapted to act'upon thefollower for raising and lowering the same, whereby the pinsll, will beprojected through the holes 15, in the top 6, of said shell or forretracting said pins 11, interiorly of the latter.

Mounted upon the shaft 16, is a ratchet wheel 18, with which engages aspring pawl 19, adapted to lock the said shaft 16, against rotation inone direction, while the same is free for rotation in the otherdirection, the pawl 19, being suitably mounted upon the inner face ofone wall of the shell. The shaft '16, has one end formed with screwthreads 20, for the detachable engagement of a key 21, therewith, topermit the turning of said shaft for the adjustment of the follower withthe pins 11, therein. The threaded end 20 of the shaft 16 is extendedeXteriorly of the shell 5 for the engagement of a key 21 thereon as theoccasion may require.

Each pin 11 near its outer end has formed therein a notch 22 serving asa seat for the work when clamped by the pin.

It will be noted that on turning the shaft the pins 11 can be raised tolany desired height by the cam 17 acting upon the fillers which'carrythe pins. men the pins 11 are protruded beyond the tops of the shellsand the work is applied by placing the same over certain of the pinswhich depresses those lying beneath the work, the latter will be broughtinto position to be gripped by the pins adjacent to the edge thereof,that is to say, the pins will lie next to the edges of the work when theshells are moved toward each other, while the other remaining pinsprotruded may be depressed by the instrument or the tool worked withshould oc- .casion require, although in a number of instances thecharacter of the work to be engraved has a face that can be operatedupon without any interference by the pins which remain protruded beyondthe top of the shell and not acting as clamps for the work. It will beapparent that any one or a number of the pins 11 can be depressedagainst the resistance of the springs 14 so as to permit certain of saidpins which remain protruded beyond the tops of the shells to engage andclamp a piece of work on oper- `ating the jaws of the block.

lVhat is claimed is:

1. An attachment for engravers blocks having jaws movable toward andaway from each other, shells mounted upon the jaws, a plurality ofvertically yieldable pins movably mounted in the shells to be protrudedbeyond the tops thereof, and means for vertically moving all ot the pinsin a single operation.

2. An attachment for engravers blocks having jaws movable toward andaway from each other, shells mounted upon the jaws, a plurality ofvertically yieldable pins movably mounted in the shells to be protrudedbeyond the tops thereof, cams for action upon the supports for the pinsto raise the same, and means for locking the cams against movement inone direction to sustain the supports ink vertically adjusted position.

3. An attachment for engravers blocks having jaws movable toward andaway from each other, shells mounted upon the jaws, a plurality ofvertically yielclable pins movably mounted in the shells to be protrudedbeyond'the tops thereof, cams for action upon the supports for the pinsto raise the same, means for locking the cams against movement in onedirection to sustain the supports in vertically adjusted position, andmeans for rotating the cams.

In testimony whereof we affix our signatures in presence of twowitnesses.

JOHN SCHEER. GEORGE F. SCHEEB.

Witnesses for John Scheer:

G. K. SAUNDERS, W. T. LnMMoN. Vitnesses for George F. Scheer:

I. H. WHITE, W. H. COOKE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

